§ 50:1 — Definitions

Louisiana § 50:1

• Jurisdiction: Louisiana
• Title 50: Surveys and Surveyors

Text

§1. Definitions
The terms defined in this Section have the following meaning when found in this
Chapter:
(1) "Deprecation" means a decision to discontinue the use of a specific unit or
method of measurement.
(2) "Geodetic coordinate" means angular coordinates defined relative to a particular
geodetic datum including but not limited to latitude, longitude, ellipsoid height, orthometric
height, or dynamic height.
(3) "Geodetic datum" means the geometric models representing the earth's size and
shape that provide abstract coordinate systems with a reference surface or origin and
orientation that serves to provide known locations to begin surveys and create maps, also
referred to as a terrestrial reference frame or reference frame.
(4) "International foot" means the length adopted in 1959 to define the unit of
measurement equal to 3,048/10,000 meter.
(5) "Meter" means the length traveled by light in a vacuum during a time interval of
exactly 1/299,792,458 seconds.
(6) "National Spatial Reference System" means the consistent coordinate system
maintained by the National Geodetic Survey that defines latitude, longitude, height, scale,
gravity, and orientation throughout the United States, including an accurate national
shoreline; a set of models that describes geophysical processes that affect spatial
measurements; and networks of permanently marked points and continuously operating
reference stations (CORS) to support three-dimensional positioning activities.
(7) "NATRF2022" means the North American Terrestrial Reference Frame of 2022.
(8) "State plane coordinate system" means the system of conformal map projections
created by the National Geodetic Survey to support surveying, engineering, and mapping
activities throughout the United States.
(9) "U.S. survey foot" means the length adopted by the United States government in
1893 to define the unit of measurement equal to 1,200/3,937 meter.
(10) "Zone" means a geographic region on the surface of the earth with a uniquely
defined projected coordinate reference system, with extents usually based on a specified
maximum linear distortion magnitude.

Legislative History

Acts 1985, No. 913, §1; Acts 2024, No. 626, §2.